28740113 has 2 divisors, whose sum is σ = 28740114. Its totient is φ = 28740112.

The previous prime is 28740097. The next prime is 28740169. The reversal of 28740113 is 31104782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 12475024 = 4033^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 28740113 - 2⁴ = 28740097 is a prime.

It is not a weakly prime, because it can be changed into another prime (28742113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14370056 + 14370057.

It is an arithmetic number, because the mean of its divisors is an integer number (14370057).

Almost surely, 2^28740113 is an apocalyptic number.

It is an amenable number.

28740113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28740113 is an equidigital number, since it uses as much as digits as its factorization.

28740113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28740113 is about 5360.9806005991. The cubic root of 28740113 is about 306.3111626834.

Adding to 28740113 its reverse (31104782), we get a palindrome (59844895).

The spelling of 28740113 in words is "twenty-eight million, seven hundred forty thousand, one hundred thirteen".